Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a711d2683f4cd0…

MALICIOUS

PDF

43.6 KB Created: 2020-08-20 03:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04c282e27950f9d83b0112402c0231a2 SHA-1: 15d05774378964e463789a37c07983d57fe7114f SHA-256: 02a711d2683f4cd0cc3029cfe337853ae834ab24594bc2ea7300d3100c5a72d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a malicious redirector link disguised as a lease agreement template, aiming to trick users into clicking it. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, many pointing to potentially malicious infrastructure, supports this. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=residential+lease+agreement+template+nsw
    • http://files.karenjweyant.com/uploads/1/3/0/8/130814676/napepezoze_memaniromumo_damisivapoko_bivokudateriga.pdf
    • http://files.funktionalglassworks.com/uploads/1/3/1/4/131406295/31c9ef.pdf
    • http://files.fabshop104.com/uploads/1/3/1/6/131637047/212d601.pdf
    • http://fedamewaf.walkersonwater.com/uploads/1/3/0/7/130739430/9029011.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7111/8235/files/fonofuzafusim.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/72454449140.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0011/files/stemi_guidelines_acc_2019.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/gexikasaxixixozixap.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/bigasoft_video_er_pro_key.pdf
    • https://cdn.shopify.com/s/files/1/0440/8007/0808/files/inform_educate_entertain_vinyl.pdf
    • https://cdn.shopify.com/s/files/1/0436/1096/4131/files/85645978670.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/29847234478.pdf
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/vegelagofomonaxigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/pikijovamarolaxezis.pdf
    • https://cdn.shopify.com/s/files/1/0429/4167/7731/files/31740833044.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/minuvafomesexizozijibom.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/2016_torrent_tracker_list.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4f.bin
4f18ab417369cb6b148e18ad0a76e1b7dbcab1214938ec0015687aff647e6210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 5376 bytes
font_01_sfnt_off00007d93.bin
cd655a5c093ad57b92666d947c8145d55d60554d08ce934d0034142cd6fd9a55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D93 10664 bytes

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